commit https://github.com/vim/vim/commit/a6b8976bb724f8c85dd5699d115d795f7b730298 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Feb 29 21:38:26 2016 +0100 patch 7.4.1463 Problem: Configure doesn't find isinf() and isnan() on some systems. Solution: Use a configure check that includes math.h.

#! /bin/sh
#
# which.sh -- find where an executable is located.  It's here because the
# "which" command is not supported everywhere.  Used by Makefile.

IFS=":"
for ac_dir in $PATH; do
	if test -f "$ac_dir/$1"; then
		echo "$ac_dir/$1"
		break
	fi
done